养神闭目: conserve one's energy by closing the eyes -- to refresh oneself
闭目养神: refresh one's spirit by closing one's eyes; close one's eyes and rest one's mind; close the eyes for rest; rest to attain mental composure; sit in repose with one's eyes closed
闭目枯坐: block one's ears and shut one's eyes to sth.; close one's eyes and sit doing nothing